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What's the Point of Multiple Redis Databases?
...t copies of the same database could be used for production, development or testing using real-time data. People may use replica to clone a redis instance to achieve the same purpose. However, the former approach is easier for existing running programs to just select the right database to switch to t...
Getting All Variables In Scope
... }
],
"kind": "var"
}
]
}
I have tested this in Chrome, Firefox and Node.
But the problem with this method is that you just have the variables defined in the function itself. For example for this one:
var g = function() {
var y = 0;
var f = functio...
How long is the SHA256 hash?
...
you can use this select statement to test it: SELECT length(to_base64(unhex(sha2('say hello to my little friend',256)))) , it is always 44 whatever the length of original string is.
– DrAhmedJava
Apr 9 '17 at 13:57
...
What is event bubbling and capturing?
...where else.
Note that the browser compatibility is not determined yet. I tested it on Chrome (66.0.3359.181) and Firefox (59.0.3) and it is supported there.
Expanding on the already great snippet from the accepted answer, this is the output using the eventPhase property
var logElement = doc...
Rotating a two-dimensional array in Python
...more in the very beautiful and clever one-liner you've posted.
To quickly test it you can copy / paste it here:
http://www.codeskulptor.org/
triangle = [[0,0],[5,0],[5,2]]
coordinates_a = triangle[0]
coordinates_b = triangle[1]
coordinates_c = triangle[2]
def rotate90ccw(coordinates):
print "...
How to get all properties values of a JavaScript Object (without knowing the keys)?
...
Why would you need to test with hasOwnProperty()? How would the key be iterated over within the loop of that object hasn't got the property?
– 1252748
Aug 25 '14 at 1:16
...
What is the relation between BLAS, LAPACK and ATLAS
...org/blas/blast-forum, but (a) there's no enforcement--a standard without a test suite isn't really a standard--and (b) I don't think that anyone implements the full set of interfaces described by that document. It's, uh, aspirational.
– Stephen Canon
Nov 10 '19...
How do I use a file grep comparison inside a bash if/else statement?
.... error
fi
For the record, [ expr ] is a shell builtin† shorthand for test expr.
Since grep returns with status 0 in case of a match, and non-zero status in case of no matches, you can use:
if grep -lq '^MYSQL_ROLE=master' ; then
# do one thing
else
# do another thing
fi
Note the us...
Unusual shape of a textarea?
...dn't work for me. The text goes below polygon and stays hidden below it. I tested with Chromium 49, Firefox 44
– deathangel908
Mar 5 '16 at 17:04
...
Xcode - How to fix 'NSUnknownKeyException', reason: … this class is not key value coding-compliant f
...mething from the XIB is cached on the simulator, which is a pain if you're testing upgrades since you actually don't want to have to delete the old app.
– Carlos P
Jul 31 '13 at 11:14
...